The utility model relates to a dust suction head for an electric dust collector, which comprises a main body of the dust suction head which forms a dust collecting chamber with an opening part for sucking dust and opened downwards and a dust passage connected with the dust collecting chamber, and dust can pass through in the dust passage. The lower part of a lateral wall part for forming the lateral wall of the main body of the dust suction head is provided with a protrusion part protruding from the lateral wall part and towards the direction opposite to the opening part, and the front end of the protrusion part is positioned within the outermost periphery of the main body of the dust suction head. Thus, when the vicinity of a wall surface is cleaned, and owing to the outer wall of the dust suction head is close to the opening part, the dust suction performance at wall corners, etc., can also be enhanced. Simultaneously, through the arrangement of the protrusion part, the contact area between the dust suction head and a surface being cleaned can be guaranteed around the opening part; an R-shaped part for reducing friction between a cleaned surface especially a blanket surface can be formed, and the operability of the dust suction head can also be maintained.